I'm guessing you decided not to trade or sell any of your parts to me.
Perhaps you got a better offer or you were offended by mine. I hope I
didn't offend you, but if someone offered you a bunch of money for them
If you just decided to hang on to them or something, please keep my email
address in case you ever do decide to part with any parts or if you are ever
looking for a nice CFX-40 as a backup or replacement.
Add photos to your e-mail with MSN 8. Get 2 months FREE*.
I found this site <http://www.sunyit.edu/~cet/FACILITIES.HTML> whi;le
searching for something else. They have three Tek 8002s and may be able to
provide copies of docs for them. If you contact them, let me know your
I guess this is slightly OT, but I figure someone here might be
interested. I'd love to have the scope myself, but it is rather heavy, and
shipping it to Houston would be risky due to the huge number of tubes.
(Close to 50 individual tubes IIRC.)
This is a rack-mount scope, and it comes with a type CA plug-in. It is
located near Santa Cruz, CA just south of Silicon Valley. If anyone is
interested, contact me off-list and I will pass on contact information.
>> I wish to pose this question with the hope that there is someone
>> else who has had the same thing happen to them, and/or can suggest
>> a cause/fix..
>> I have a Commodore PET 2001 16 N. Whenever I try to write or read
>> from tape (using 1530 drive) the computer freezes up and I am forced
>> to turn off/on. After powering the unit back on, the screen is filled
>This sounds like a power supply problem -- the extra load of the tape
>drive motor is pulling the unregulated supply down, which is then
>causeing the 5V line to drop too low.
>Many PETs have a white Molex 0.156" power connector on the mainboard, the
>socket part of which is wired to the transformer and smoothing capacitors
>mounted seprately in the case. This connector is somewhat under-rated,
>and tends to go high resistance and overheat. If the plastic has started
>to turn brown, this is one of your problems.
Put DC#4 on the pins and don't worry about it.
>Either replace the connector, or remove it completely and solder the
>wires directly to the main PCB (you might then want to add an in-line
>connector of a suitable rating to aid future servicing).
>Also, check the smoothing capacitors (particularly the large ones mounted
>off the main PCB). It's possible one of those has dried up.
I wish to pose this question with the hope that there is someone
else who has had the same thing happen to them, and/or can suggest
I have a Commodore PET 2001 16 N. Whenever I try to write or read
>from tape (using 1530 drive) the computer freezes up and I am forced
to turn off/on. After powering the unit back on, the screen is filled
with garbled characters. Turing off/on does not fix. However if
I wait a day or two later the computer is OK and the garbled characters
no longer appear. I have reproduced this series of events twice
and again the computer "fixes itself." I do not want to try again
for fear of permanently ruining the machine. Any ideas about what
causes this? Anyone had this happen to them?
Actually, if I had known you had a bid in on
it, I wouldn't have bid against you... Because
of my cr*ppy phone connection (no dsl/cable here)
I use an online bidding service, so when I find
an item, I just register it with the bidding service
and forget about it... they email me at the end of
the auction to let me know if I've won or lost...
But to get back on topic, I can then assume that this
was one of those flash-in-the-pan ANSI standards? I've
been around quite a while, and I don't remember coming
across this one... (and I remember MASSBUS, IPI, SMD, MFM,
ESDI, and a handful of other abbreviation...)
Oh well, another board for the board-archive/stack...
From: Al Kossow [mailto:firstname.lastname@example.org]
Sent: Thursday, July 31, 2003 2:49 PM
Subject: Re: Emulex SC04 controller... what kind of disk does it talk
anyone recognize this puppy?
yup.. ANSI 8" interface
I was VERY happy someone outbid me on it when I discovered what
If someone has a paper copy of the X3.101 spec, i'd like to add
it to the archives on spies.
It appears to be based on the Shugart/Quantum 8" drive standard
but on a single 50 pin connector instead of a 50 and 26.
Just picked up an Emulex SC04 disk controller (ebay item).
I thoughtit was a Qbus SCSI (did a prelim. deja search, and
the one note I came across led me to believe this).
Apparently I was wrong... the part numberfor the controller
is SC0410201-LXB, and (I believe, but I couldbe wrong) this
maps to the .pdf on AEK's site:
This manual provides a pinout and refers to the disk interface
as an ANSI X3T9/1226 interface. This doesn't google to anything
useful, however I found an identical pinout list which refers
to an ANSI X3.101 interface. Again, I don't recognize this at all.
It's definitely not SCSI (if this is the correct manual) and
doesn't seem to be SMD... Perhaps I am just blind here...
anyone recognize this puppy?
For reference, the ebay page w/picture is still available...
> I have an old Quantum Lightning 540 AT hard disk
> However, now, having tried to install the drive in a
> more modern machine to archive the data to CDR, the
> drive while recognized by the machine and the drive
> itself spinning up and apparently working returns a
> "hard disk read failure" error.
Well it has drive to the spindle motor by the sounds of it. Whether the head
assembly is intact is another matter.
I think you can swap the boards on these things and expect them to still work -
so using the combination of your chassis / motor / platter assembly and the
logic board off a good drive might be enough - unless it is a fault in the head
I have a Prodrive LPS 540AT in front of me right now which is likely the same
thing as a Lightning. There seems to be just the one ribbon cable connecting
the logic board to everything so a swap wouldn't be tricky and might cure
things. Those drives used to be everywhere at one point so finding one
shouldn't be too hard.
Do double-check your drive cabling and BIOS settings (assuming it's a PC you're
hooking up to) etc. - modern PC's seem to have a few billion settings for the
disks and probably think you're using a new drive; they may make incorrect
assumptions about data rates etc.
> Can anybody point me in the direction of any good
> information regarding the testing/diagnosis/repair of
> head-disk-assembly problems?
I know Western Digital used to release diagnostic utilities for their drives
and held them on their website; there may be similar Quantum ones floating
Backward conditioning: putting saliva in a dog's mouth in an attempt to make a bell ring.
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I am having problems with the unsupported 'split' utility on a
PDP-11/23+ running RT-11 5.03
I am trying to split a 35000 block file into 3 files of similar sizes.
I understand that you use octal values for block boundaries. Here is
the command line that I have been using unsuccessfully:
The octal value of 35000 is 104270.
(where 69513 = 104270-34757)
However, I receive the following error:
I need some help on how to specify the block boundaries.
Barry Skidmore <skidmore(a)worldvenue.org>
Sorry about that, I didn't realize I was posting to a list! :-)
I actually sent off an order Wednesday morning to Black Hole Inc. for
a monitor cable, keyboard, and mouse...
My thanks to everyone who responded.